CVE-2022-1965: CODESYS runtime system prone to file deletion due to improper error handling

Severity: medium (CVSS 5.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-06-24 · updated 2026-06-17
Weakness: CWE-755

Description

Multiple products of CODESYS implement a improper error handling. A low privilege remote attacker may craft a request, which is not properly processed by the error handling. In consequence, the file referenced by the request could be deleted. User interaction is not required.

Affected products

CODESYS PLCWinNT: from 2.0 before 2.4.7.57 — fixed in 2.4.7.57
CODESYS Runtime Toolkit: from 2.0 before 2.4.7.57 — fixed in 2.4.7.57

How to fix

Upgrade to a fixed version: CODESYS PLCWinNT 2.4.7.57; CODESYS Runtime Toolkit 2.4.7.57. Check the vendor advisory for mitigations.

References

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